This is now a usable system.
However, for education and possible flexibility, I next intend to identify benchmark tests for both Mac and Windows, run them as-is on standard disks, GRAID and ProAVIO RAID, attempt install MacDrive (via workaround to dodge RAID driver compatibility issues), retest, also try other cross-filesystem tools. Also, for the ProAVIO NTFS partition, want to identify a reliable filesystem synchronizer. ABSynch comes to mind but I have not used it before.